发明名称 |
Toner, two-component developer and image forming method |
摘要 |
A toner is disclosed which has toner particles and an external additive. The toner has (a) in circularity distribution of particles measured with a flow type particle image analyzer, an average circularity of from 0.920 to 0.995, containing particles with a circularity of less than 0.950 in an amount of from 2% by number to 40% by number; and (b) a weight-average particle diameter of from 2.0 mu m to 9.0 mu m as measured by Coulter method. The external additive has, on the toner particles, at least (i) an inorganic fine powder (A) present in the state of primary particles or secondary particles and having an average particle length of from 10 m mu m to 400 m mu m and a shape factor SF-1 of from 100 to 130 and (ii) a non-spherical inorganic fine powder (B) formed by coalescence of a plurality of particles and having a shape factor SF-1 of greater than 150. Also, a two-component developer and an image forming method, using the toner, are disclosed.
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申请公布号 |
US6077635(A) |
申请公布日期 |
2000.06.20 |
申请号 |
US19980099527 |
申请日期 |
1998.06.18 |
申请人 |
CANON KABUSHIKI KAISHA |
发明人 |
OKADO, KENJI;FUJITA, RYOICHI;IIDA, WAKASHI;MORIKI, YUJI;YOSHIZAKI, KAZUMI;MAGOME, MICHIHISA |
分类号 |
G03G9/08;G03G9/097;(IPC1-7):G03G13/01 |
主分类号 |
G03G9/08 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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